create dummy images using node.js

index.js

const fs = require("fs")
const { createCanvas } = require("canvas")

const alphabets = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
const chars = alphabets + alphabets.toLowerCase() + "1234567890"

for (const [index, char] of [...chars].entries()) {
	const canvas = createCanvas(80, 80)
	const ctx = canvas.getContext("2d")
	ctx.font = "bold 70px serif"
	ctx.textAlign = "center"
	ctx.fillText(char, 40, 70)

	const buf = canvas.toBuffer("image/png")
	fs.writeFileSync(`${String(index).padStart(2, "0")}-${char}.png`, buf)
}